I have 25,000 cp viscous liquid, I started transferring this liquid with a gear pump at 18 Hz with 1400 gm/sec output, after one week the output is decreased so I increased it to 50 Hz and got 700 gm/sec and with time it is decreased day after day to 300 gm/sec. I opened the line and checked the pump and have not notice any difference. How can I solve this issue?
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